US20090311456A1 - Non-woven, self-wrapping thermal sleeve - Google Patents
Non-woven, self-wrapping thermal sleeve Download PDFInfo
- Publication number
- US20090311456A1 US20090311456A1 US12/481,670 US48167009A US2009311456A1 US 20090311456 A1 US20090311456 A1 US 20090311456A1 US 48167009 A US48167009 A US 48167009A US 2009311456 A1 US2009311456 A1 US 2009311456A1
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- United States
- Prior art keywords
- self
- wall
- wrapping
- opposite sides
- woven
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
- H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a general shape other than plane
- B32B1/08—Tubular products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/0207—Wire harnesses
- B60R16/0215—Protecting, fastening and routing means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
- F16L59/022—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves with a single slit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
- B32B2255/205—Metallic coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/12—Conjugate fibres, e.g. core/sheath or side-by-side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/14—Mixture of at least two fibres made of different materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/08—Cars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/18—Aircraft
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1362—Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.]
Definitions
- This invention relates generally to sleeves for protecting elongate members, and more particularly to non-woven, self-wrapping thermal sleeves.
- wires and wire harnesses carried in sleeves in vehicles can be routed through areas subjected to relatively high heat while in use.
- applying tape is labor intensive, and thus, costly.
- the appearance of the tape can be unsightly, particularly over time as the tape wears, which in turn, can result in the wires being partially exposed. Further, in service, tape can provide difficulties in readily accessing the wound wires.
- sleeves in the form of woven, braided or knitted fabric sleeves about the wires to reduce the potential for heat damage to the wires.
- the sleeves are typically manufactured from heat resistant materials, such as selected monofilament and multifilament yarns.
- the sleeves are either wrapped and fastened about the wires, or applied as a self wrapping sleeve construction.
- non-woven sleeves having a non-woven layer and an outer reflective layer, wherein the sleeves are not self-wrappable, and are either wrapped and fastened about the wires with a secondary fastening device, or supplied as a tubular, non-wrappable sleeve.
- a non-woven, self-wrapping thermal sleeve manufactured according to the present invention overcomes or greatly minimizes any limitations of the art described above.
- the sleeve has an elongate, non-woven substrate with opposite sides that are self-wrapping about a longitudinal axis to define a generally tubular cavity in which the elongate members are received.
- An outermost reflective layer is applied over an outer surface of the non-woven substrate.
- the opposite sides of the substrate are extendible away from one another under an externally applied force to allow the elongate members to be disposed radially into the cavity.
- the external force is released, thereby allowing the opposite sides of the wall to return to their self-wrapped, tubular configuration.
- the outermost reflective layer is biased by the substrate to substantially encapsulate the wires circumferentially about the cavity.
- the non-woven material forming the substrate of the sleeve has low melt or bi-component fibers mixed with standard thermoplastic fibers.
- the bi-component or low melt fibers when subjected to a heat treatment, take on a heat set configuration, thereby biasing the substrate to a self-curled memory position.
- the standard thermoplastic fibers act in part to provide the desired density and thickness to the substrate, as desired, thereby providing additional thermal protection and rigidity to the sleeve.
- the substrate is constructed having a suitable thickness and density of mechanically intertwined, non-woven standard thermoplastic fibers and low melt or bi-component fibers that act as a thermal barrier, while also being heat biased and self-curled into a tubular shape.
- the type, quantity, size and ratio of the non-woven standard thermoplastic fibers and low melt or bi-component fibers of the non-woven substrate can be selected to provide the sleeve with the desired stiffness, springback bias of the heat set curl, hand or softness, thermal heat resistance, and substrate density and thickness.
- the outermost reflective layer can be provided as a metalized film or a metal foil layer having an adhesive for adhesion to the outer surface of the substrate.
- the outermost reflective layer can be provided to extend completely circumferentially about the substrate to circumferentially encapsulate the substrate, thereby providing complete circumferential thermal protection to the enclosed wires while also maintaining the sleeve in a closed configuration while in use.
- the sleeve can have a foil tape applied over a seam extending along the length of the sleeve to circumferentially encapsulate the substrate with a continuous reflective foil layer to provide complete circumferential thermal protection to the enclosed wires and to maintain the sleeve in a circumferentially closed configuration while in use.
- FIG. 1 is a perspective view of a non-woven, self-wrapping thermal sleeve constructed in accordance with one aspect of the invention carrying and protecting elongate members therein;
- FIG. 2 is an enlarged end view of the sleeve of FIG. 1 ;
- FIG. 3 is an enlarged end view of a sleeve constructed in accordance with another aspect of the invention.
- FIG. 4 is an enlarged end view of a sleeve constructed in accordance with another aspect of the invention.
- FIG. 5 is an enlarged end view of a sleeve constructed in accordance with another aspect of the invention.
- FIG. 6 is an enlarged end view of a sleeve constructed in accordance with yet another aspect of the invention.
- FIG. 1 shows a non-woven, self-wrapping thermal sleeve, referred to hereafter as sleeve 10 , constructed in accordance with one aspect of the invention.
- the sleeve 10 has an inner non-woven substrate layer, referred to hereafter as wall 12 , constructed from an engineered non-woven material and an outer-most reflective layer 14 applied over an outer surface 15 ( FIG. 2 ) of the wall 12 .
- the wall 12 is heat-set into a self-wrapping tubular configuration to provide an enclosed tubular inner cavity 16 when in its relaxed, self-wrapped configuration.
- the cavity 16 is readily accessible along a longitudinal axis 18 of the sleeve 10 so that elongate members, such as wires 19 or a wire harness, for example, can be readily disposed radially into the cavity 16 , and conversely, removed from the cavity 16 , such as during service.
- the wall 12 can be constructed having any suitable size, including length, diameter and wall thickness, and can also be provided having a desired density, depending on the ratio of the constituents used to form the non-woven wall 12 .
- the reflective layer 14 can be provided as a film/foil laminate, such as 1/3 mil foil-laminating adhesive-1/2 mil metalized PET film, for example. As such, the foil provides reflectivity and the PET film provides durability in use.
- the reflective layer 14 can be attached to the wall 12 in any suitable fashion, such as by any suitable adhesive, including heatseals or an intermediate pressure sensitive adhesive, represented in FIG. 2 generally at 17 , for example.
- the reflective layer 14 provides enhanced thermal protection to the wires 19 and can also facilitate maintaining the sleeve 10 in its wrapped tubular configuration about the wires 19 in use.
- the sleeve 10 can be constructed having any desired length and various finished wall thicknesses (t).
- the non-woven material forming the wall 12 has low melt (single homogenous material) or bi-component fibers represented generally at 21 preferably mixed with standard thermoplastic fibers represented generally at 23 .
- the non-woven material forming the wall 12 could be constructed entirely of the low melt or bi-component fibers 21 .
- the low melt (melt at a temperature lower than the standard thermoplastic fibers 23 ) or bi-component fibers 21 when heat treated in a heat-setting process, take on a heat-set configuration, thereby biasing the wall 12 into a self-curled memory tubular shape.
- the bi-component fibers 21 can be provided having a core of a standard thermoplastic material, such as polyethylene terephthalate (PET), for example, with an outer sheath of polypropylene, polyethylene, or low melt polyester, for example.
- the standard thermoplastic fibers 23 can be provided as any thermoplastic fiber, such as PET, for example, and act in part to provide the desired density and thickness (t) to the wall 12 , as desired, thereby providing additional thermal protection and rigidity to the sleeve 10 , while also being relatively inexpensive compared to the heat-settable fibers 21 .
- the substrate 12 is constructed having a suitable thickness and density of the low melt or bi-component fibers 21 preferably combined with the standard thermoplastic fibers 23 , depending on the application, while also being biased to self-curl, at least initially and prior to use, into a tubular shape.
- the construction of the non-woven material can be processed utilizing any mechanism of mechanically intertwining the fibers (e.g.needlepunching), chemically bonding the fibers together (e.g. glue the fibers together), or thermally bonding the fibers together (e.g. at least partially melting the fibers together via heating and cooling).
- the type, quantity, size and ratio of the low melt or bi-component fibers 21 and non-woven standard thermoplastic fibers 23 of the non-woven substrate 12 can be varied, and thus selected to provide the sleeve 10 with the desired stiffness, springback bias of the heat set curl, hand (softness), thermal heat resistance, and substrate density and overall thickness (t).
- the sleeve 10 can be constructed having a relatively small outer diameter, while still providing an inner surface 25 of suitable inner diameter to provide the cavity 16 with sufficient volume to contain a predetermined lateral cross-sectional area of wires. If the application is more severe, wherein the sleeve is exposed to extreme heat and/or debris, then the thickness (t) of the wall 12 can be increased.
- increasing the wall thickness (t) typically provides the sleeve 10 with more rigidity, and thus, larger cavities 16 can be constructed while still providing the sleeve 10 with adequate rigidity and strength to contain increased numbers and diameters of wire.
- the wall 12 has opposite sides 20 , 22 extending along and generally parallel to the axis 18 that terminate at opposite ends 24 , 26 .
- the sides 20 , 22 can overlap one another at least slightly to fully enclose the cavity 16 , and thus, provide enhanced protection to the wires 19 contained in the cavity 16 .
- the sides 20 , 22 are readily extendable away from one another under an externally applied force to at least partially open and expose the cavity 16 . Accordingly, the wires 19 can be readily disposed into the cavity 16 during assembly or removed from the cavity 16 during service.
- the sides 20 , 22 return automatically to their natural, overlapping self-wrapped position.
- the reflective layer 14 can be provided having the same width as the wall 12 and can be attached in alignment with the wall 12 to substantially cover the entire width of the wall 12 without extending beyond the sides 20 , 22 . Accordingly, the outer circumference of the wall 12 can be covered or substantially covered by the reflective layer 14 . Further, the reflective layer 14 can be provided having the same length as the wall 12 , and thus, can cover or substantially cover the entire outer surface 15 of the wall 12 , thereby leaving no or substantially no exposed areas of the wall outer surface 15 to the outside environment.
- a supplemental closure member or mechanism such as reflective layer of foil tape 28 , for example, can be adhered to traverse a seam 29 extending along and generally parallel to the axis 18 between the opposite sides 20 , 22 of the wall 12 .
- the foil tape 28 ensures that the underlying wall 12 , and thus the wires 19 , are fully encapsulated and sealed circumferentially by the reflective surfaces provided by the reflective layer 14 and the reflective tape 28 .
- the foil tape 28 acts to maintain the sleeve 10 in its circumferentially closed configuration in use by being adhered adjacent the opposite sides 20 , 22 of the wall 12 and thus, prevents the opposite sides 20 , 22 from inadvertently opening circumferentially way from one another. As such, even in applications having heat great enough to cause the fibers 21 in the wall 12 to loose their self-curled bias, the foil tape 28 maintains the wall 12 in its tubular, closed configuration.
- a sleeve constructed in accordance with another aspect of the invention is shown generally at 110 , wherein the same reference numerals used above offset by a factor of 100 indicate similar features discussed above.
- the sleeve 110 has a wall 112 with opposite sides 120 , 122 configured to substantially abut one another to form a butt-type seam or joint upon being wrapped about elongate members, rather than overlapping one another as with the sleeve 10 .
- An outer reflective layer 114 is provided having the same width as the wall 112 and is attached in alignment and generally flush with the sides 120 , 122 of the wall 12 to completely cover or substantially cover the entire width of the wall 112 extending between the sides 120 , 122 .
- an entire outer surface 115 of the wall 112 is covered or substantially covered by the reflective layer 114 .
- the sleeve 110 also has a reflective foil tape 128 adhered over an axially extending seam 129 formed at the butt-type joint.
- the tape 128 ensures that the underlying wall 112 and the elongate members or wires within the cavity 116 are fully encapsulated circumferentially by the reflective surfaces provided by the reflective layer 114 and the reflective tape 128 . Accordingly, the cavity 116 is sealed from the potential ingress of contamination, as well as being fully shielded from external heat radiation. Further, as with the sleeve 10 , the reflective tape 128 also maintains the sleeve 110 in its circumferentially closed configuration in use, even if the wall 112 looses its initially heat-set bias.
- a sleeve constructed in accordance with another aspect of the invention is shown generally at 210 , wherein the same reference numerals used above offset by a factor of 200 indicate similar features discussed above.
- the sleeve 210 has a wall 212 with opposite sides 220 , 222 configured to substantially abut one another, similarly as describe above with regard to the wall 112 , upon being wrapped about the elongate members or wires.
- An outer reflective layer 214 is provided having a width that is greater than the width extending between the sides 220 , 220 of the wall 212 .
- One side 30 of the reflective layer 214 is attached in substantial alignment with one side 220 of the wall 212 such that it is substantially flush therewith, while an opposite side 32 of the reflective layer 214 extends circumferentially beyond the other side 222 of the wall 212 . Accordingly, the portion of the reflective layer 214 extending circumferentially beyond the side 222 can be attached or adhered to an outer surface 34 of the reflective layer to completely cover the entire width of the wall 212 extending between the sides 220 , 222 and to close off an axially extending seam 229 of the wall 212 .
- a strip of release paper can be provide to cover a pressure sensitive adhesive portion of the reflective layer 214 extending beyond the side 222 , until it becomes desired to expose the adhesive surface for bonding during assembly, for example.
- any suitable adhesive or attachment mechanism is considered to be within the scope of the invention, such as hook and loop fasteners, for example.
- a sleeve constructed in accordance with another aspect of the invention is shown generally at 310 , wherein the same reference numerals used above offset by a factor of 300 indicate similar features discussed above.
- the sleeve 310 has a wall 312 with opposite sides 320 , 322 configured to substantially abut one another, similarly as describe above with regard to the wall 112 , upon being wrapped about the elongate members or wires.
- An outer reflective layer 314 is provided having substantially the same width as the wall 312 , however unlike the sleeve 110 in FIG. 3 , the width of the reflective layer 314 is attached misaligned (staggered) relative to the width of the wall 312 .
- one side 330 of the reflective layer 314 is misaligned (staggered) with the side 320 of the wall, such that the side 330 of the reflective layer is adhered circumferentially inwardly of the side 320 of the wall 312 , thereby leaving an exposed outer surface of the wall 312 .
- another side 332 of the reflective layer 314 extends circumferentially beyond the other side 322 of the wall 312 in staggered relation thereto.
- the portion of the reflective layer 314 extending beyond the side 322 can be adhered to the exposed outer surface of the wall 312 during assembly such that the opposite sides 330 , 332 of the reflective layer 314 are brought into abutment or substantial abutment with one another to completely or substantially cover the entire width of the wall 312 . Further, upon being fully assembled, the reflective layer 314 maintains the wall 312 in its circumferentially closed configuration. It should be recognized that the width of the reflective outer layer 314 could be slightly greater than the width of the wall 312 , if desired, thereby providing some overlap of the reflective outer layer 314 on itself upon assembly.
- a sleeve constructed in accordance with another aspect of the invention is shown generally at 410 , wherein the same reference numerals used above offset by a factor of 400 indicate similar features discussed above.
- the sleeve 410 has a wall 412 with opposite sides 420 , 422 configured to circumferentially overlap one another upon being wrapped about the elongate members or wires in “cigarette” type fashion.
- An outer reflective layer 414 is provided having a width that is greater than the width extending between the sides 420 , 422 of the wall 412 .
- One side 430 of the reflective layer 414 is attached in alignment or substantial alignment with one side 420 of the wall 412 such that it is flush or substantially flush therewith, while an opposite side 432 of the reflective layer 414 extends circumferentially beyond the other side 422 of the wall 412 to provide a flap portion.
- the flap portion of the reflective layer 414 extending beyond the side 422 can be attached, such as by being adhered, for example, to a outer surface 434 of the reflective layer 414 to completely cover the entire circumferential width of the wall 412 extending between the sides 420 , 422 .
- a strip of release paper can be provided to cover an adhesive portion of the reflective layer 414 extending beyond the side 422 , until it becomes desired to expose the adhesive surface for bonding during assembly.
Abstract
Description
- This application claims the benefit of U.S. Provisional Application Ser. No. 61/060,894, filed Jun. 12, 2008, which is incorporated herein by reference in its entirety.
- 1. Technical Field
- This invention relates generally to sleeves for protecting elongate members, and more particularly to non-woven, self-wrapping thermal sleeves.
- 2. Related Art
- It is known that wires and wire harnesses carried in sleeves in vehicles, such as in automobiles, aircraft or aerospace craft, can be routed through areas subjected to relatively high heat while in use. As such, it is customary to spirally wrap wires and wire harnesses with high temperature resistant foil tape to reduce the potential for heat damage to the wires. Unfortunately, applying tape is labor intensive, and thus, costly. In addition, the appearance of the tape can be unsightly, particularly over time as the tape wears, which in turn, can result in the wires being partially exposed. Further, in service, tape can provide difficulties in readily accessing the wound wires.
- Other than applying tape, it is known to provide sleeves in the form of woven, braided or knitted fabric sleeves about the wires to reduce the potential for heat damage to the wires. The sleeves are typically manufactured from heat resistant materials, such as selected monofilament and multifilament yarns. The sleeves are either wrapped and fastened about the wires, or applied as a self wrapping sleeve construction. Further, it is known to provide non-woven sleeves having a non-woven layer and an outer reflective layer, wherein the sleeves are not self-wrappable, and are either wrapped and fastened about the wires with a secondary fastening device, or supplied as a tubular, non-wrappable sleeve. If wrapped and fastened, additional costs are incurred for the fasteners and in attaching the fasteners to the sleeves. If tubular and non-wrappable, installation problems can arise. Further, additional labor and/or processes are typically involved to secure the sleeves about the wires. As such, although these sleeves generally prove useful in protecting the wires from exposure to heat in use, they can be relatively costly to manufacture, given that they are woven, knitted or braided, with additional costs being incurred to attach fasteners to the sleeves and to secure the sleeves about the wires.
- A non-woven, self-wrapping thermal sleeve manufactured according to the present invention overcomes or greatly minimizes any limitations of the art described above.
- One aspect of the invention provides a self-wrapping, non-woven thermal sleeve for routing and protecting elongate members from exposure to external heat. The sleeve has an elongate, non-woven substrate with opposite sides that are self-wrapping about a longitudinal axis to define a generally tubular cavity in which the elongate members are received. An outermost reflective layer is applied over an outer surface of the non-woven substrate. The opposite sides of the substrate are extendible away from one another under an externally applied force to allow the elongate members to be disposed radially into the cavity. Upon disposing the elongate members within the cavity, the external force is released, thereby allowing the opposite sides of the wall to return to their self-wrapped, tubular configuration. The outermost reflective layer is biased by the substrate to substantially encapsulate the wires circumferentially about the cavity.
- According to one aspect of the invention, the non-woven material forming the substrate of the sleeve has low melt or bi-component fibers mixed with standard thermoplastic fibers. The bi-component or low melt fibers, when subjected to a heat treatment, take on a heat set configuration, thereby biasing the substrate to a self-curled memory position. The standard thermoplastic fibers act in part to provide the desired density and thickness to the substrate, as desired, thereby providing additional thermal protection and rigidity to the sleeve. Accordingly, the substrate is constructed having a suitable thickness and density of mechanically intertwined, non-woven standard thermoplastic fibers and low melt or bi-component fibers that act as a thermal barrier, while also being heat biased and self-curled into a tubular shape.
- According to another aspect of the invention, the type, quantity, size and ratio of the non-woven standard thermoplastic fibers and low melt or bi-component fibers of the non-woven substrate can be selected to provide the sleeve with the desired stiffness, springback bias of the heat set curl, hand or softness, thermal heat resistance, and substrate density and thickness.
- According to another aspect of the invention, the outermost reflective layer can be provided as a metalized film or a metal foil layer having an adhesive for adhesion to the outer surface of the substrate.
- According to another aspect of the invention, the outermost reflective layer can be provided to extend completely circumferentially about the substrate to circumferentially encapsulate the substrate, thereby providing complete circumferential thermal protection to the enclosed wires while also maintaining the sleeve in a closed configuration while in use.
- According to yet another aspect of the invention, the sleeve can have a foil tape applied over a seam extending along the length of the sleeve to circumferentially encapsulate the substrate with a continuous reflective foil layer to provide complete circumferential thermal protection to the enclosed wires and to maintain the sleeve in a circumferentially closed configuration while in use.
- These and other aspects, features and advantages of the invention will become readily apparent to those skilled in the art in view of the following detailed description of presently preferred embodiments and best mode, appended claims, and accompanying drawings, in which:
-
FIG. 1 is a perspective view of a non-woven, self-wrapping thermal sleeve constructed in accordance with one aspect of the invention carrying and protecting elongate members therein; -
FIG. 2 is an enlarged end view of the sleeve ofFIG. 1 ; -
FIG. 3 is an enlarged end view of a sleeve constructed in accordance with another aspect of the invention; -
FIG. 4 is an enlarged end view of a sleeve constructed in accordance with another aspect of the invention; -
FIG. 5 is an enlarged end view of a sleeve constructed in accordance with another aspect of the invention; and -
FIG. 6 is an enlarged end view of a sleeve constructed in accordance with yet another aspect of the invention. - Referring in more detail to the drawings,
FIG. 1 shows a non-woven, self-wrapping thermal sleeve, referred to hereafter assleeve 10, constructed in accordance with one aspect of the invention. Thesleeve 10 has an inner non-woven substrate layer, referred to hereafter aswall 12, constructed from an engineered non-woven material and an outer-mostreflective layer 14 applied over an outer surface 15 (FIG. 2 ) of thewall 12. Thewall 12 is heat-set into a self-wrapping tubular configuration to provide an enclosed tubularinner cavity 16 when in its relaxed, self-wrapped configuration. Thecavity 16 is readily accessible along alongitudinal axis 18 of thesleeve 10 so that elongate members, such aswires 19 or a wire harness, for example, can be readily disposed radially into thecavity 16, and conversely, removed from thecavity 16, such as during service. Thewall 12 can be constructed having any suitable size, including length, diameter and wall thickness, and can also be provided having a desired density, depending on the ratio of the constituents used to form the non-wovenwall 12. Thereflective layer 14 can be provided as a film/foil laminate, such as 1/3 mil foil-laminating adhesive-1/2 mil metalized PET film, for example. As such, the foil provides reflectivity and the PET film provides durability in use. Otherwise, other reflective materials could be used, including a single metal foil layer, for example. Thereflective layer 14 can be attached to thewall 12 in any suitable fashion, such as by any suitable adhesive, including heatseals or an intermediate pressure sensitive adhesive, represented inFIG. 2 generally at 17, for example. Thereflective layer 14 provides enhanced thermal protection to thewires 19 and can also facilitate maintaining thesleeve 10 in its wrapped tubular configuration about thewires 19 in use. - The
sleeve 10 can be constructed having any desired length and various finished wall thicknesses (t). The non-woven material forming thewall 12 has low melt (single homogenous material) or bi-component fibers represented generally at 21 preferably mixed with standard thermoplastic fibers represented generally at 23. However, it is contemplated that the non-woven material forming thewall 12 could be constructed entirely of the low melt orbi-component fibers 21. The low melt (melt at a temperature lower than the standard thermoplastic fibers 23) orbi-component fibers 21, when heat treated in a heat-setting process, take on a heat-set configuration, thereby biasing thewall 12 into a self-curled memory tubular shape. Thebi-component fibers 21 can be provided having a core of a standard thermoplastic material, such as polyethylene terephthalate (PET), for example, with an outer sheath of polypropylene, polyethylene, or low melt polyester, for example. The standardthermoplastic fibers 23 can be provided as any thermoplastic fiber, such as PET, for example, and act in part to provide the desired density and thickness (t) to thewall 12, as desired, thereby providing additional thermal protection and rigidity to thesleeve 10, while also being relatively inexpensive compared to the heat-settable fibers 21. Accordingly, thesubstrate 12 is constructed having a suitable thickness and density of the low melt orbi-component fibers 21 preferably combined with the standardthermoplastic fibers 23, depending on the application, while also being biased to self-curl, at least initially and prior to use, into a tubular shape. The construction of the non-woven material can be processed utilizing any mechanism of mechanically intertwining the fibers (e.g.needlepunching), chemically bonding the fibers together (e.g. glue the fibers together), or thermally bonding the fibers together (e.g. at least partially melting the fibers together via heating and cooling). - The type, quantity, size and ratio of the low melt or
bi-component fibers 21 and non-woven standardthermoplastic fibers 23 of thenon-woven substrate 12 can be varied, and thus selected to provide thesleeve 10 with the desired stiffness, springback bias of the heat set curl, hand (softness), thermal heat resistance, and substrate density and overall thickness (t). As such, depending on the application, thesleeve 10 can be constructed having a relatively small outer diameter, while still providing aninner surface 25 of suitable inner diameter to provide thecavity 16 with sufficient volume to contain a predetermined lateral cross-sectional area of wires. If the application is more severe, wherein the sleeve is exposed to extreme heat and/or debris, then the thickness (t) of thewall 12 can be increased. In addition, increasing the wall thickness (t) typically provides thesleeve 10 with more rigidity, and thus,larger cavities 16 can be constructed while still providing thesleeve 10 with adequate rigidity and strength to contain increased numbers and diameters of wire. - The
wall 12 hasopposite sides axis 18 that terminate at opposite ends 24, 26. When thewall 12 is in its self-wrapped tubular configuration, generally free from any externally applied forces, thesides cavity 16, and thus, provide enhanced protection to thewires 19 contained in thecavity 16. Thesides cavity 16. Accordingly, thewires 19 can be readily disposed into thecavity 16 during assembly or removed from thecavity 16 during service. Upon releasing the externally applied force, thesides - As shown in
FIG. 2 , thereflective layer 14 can be provided having the same width as thewall 12 and can be attached in alignment with thewall 12 to substantially cover the entire width of thewall 12 without extending beyond thesides wall 12 can be covered or substantially covered by thereflective layer 14. Further, thereflective layer 14 can be provided having the same length as thewall 12, and thus, can cover or substantially cover the entireouter surface 15 of thewall 12, thereby leaving no or substantially no exposed areas of the wallouter surface 15 to the outside environment. - As best shown in
FIG. 2 , to further enhance the thermal protection provided by thesleeve 12, a supplemental closure member or mechanism, such as reflective layer offoil tape 28, for example, can be adhered to traverse aseam 29 extending along and generally parallel to theaxis 18 between theopposite sides wall 12. Thefoil tape 28 ensures that theunderlying wall 12, and thus thewires 19, are fully encapsulated and sealed circumferentially by the reflective surfaces provided by thereflective layer 14 and thereflective tape 28. In addition, thefoil tape 28 acts to maintain thesleeve 10 in its circumferentially closed configuration in use by being adhered adjacent theopposite sides wall 12 and thus, prevents theopposite sides fibers 21 in thewall 12 to loose their self-curled bias, thefoil tape 28 maintains thewall 12 in its tubular, closed configuration. - In
FIG. 3 , a sleeve constructed in accordance with another aspect of the invention is shown generally at 110, wherein the same reference numerals used above offset by a factor of 100 indicate similar features discussed above. Thesleeve 110 has awall 112 withopposite sides sleeve 10. An outerreflective layer 114 is provided having the same width as thewall 112 and is attached in alignment and generally flush with thesides wall 12 to completely cover or substantially cover the entire width of thewall 112 extending between thesides sleeve 10 discussed above, an entireouter surface 115 of thewall 112 is covered or substantially covered by thereflective layer 114. - The
sleeve 110 also has areflective foil tape 128 adhered over an axially extendingseam 129 formed at the butt-type joint. Thetape 128 ensures that theunderlying wall 112 and the elongate members or wires within thecavity 116 are fully encapsulated circumferentially by the reflective surfaces provided by thereflective layer 114 and thereflective tape 128. Accordingly, thecavity 116 is sealed from the potential ingress of contamination, as well as being fully shielded from external heat radiation. Further, as with thesleeve 10, thereflective tape 128 also maintains thesleeve 110 in its circumferentially closed configuration in use, even if thewall 112 looses its initially heat-set bias. - In
FIG. 4 , a sleeve constructed in accordance with another aspect of the invention is shown generally at 210, wherein the same reference numerals used above offset by a factor of 200 indicate similar features discussed above. Thesleeve 210 has awall 212 withopposite sides wall 112, upon being wrapped about the elongate members or wires. An outerreflective layer 214 is provided having a width that is greater than the width extending between thesides wall 212. Oneside 30 of thereflective layer 214 is attached in substantial alignment with oneside 220 of thewall 212 such that it is substantially flush therewith, while anopposite side 32 of thereflective layer 214 extends circumferentially beyond theother side 222 of thewall 212. Accordingly, the portion of thereflective layer 214 extending circumferentially beyond theside 222 can be attached or adhered to anouter surface 34 of the reflective layer to completely cover the entire width of thewall 212 extending between thesides axially extending seam 229 of thewall 212. If desired, a strip of release paper can be provide to cover a pressure sensitive adhesive portion of thereflective layer 214 extending beyond theside 222, until it becomes desired to expose the adhesive surface for bonding during assembly, for example. Of course, any suitable adhesive or attachment mechanism is considered to be within the scope of the invention, such as hook and loop fasteners, for example. - In
FIG. 5 , a sleeve constructed in accordance with another aspect of the invention is shown generally at 310, wherein the same reference numerals used above offset by a factor of 300 indicate similar features discussed above. Thesleeve 310 has awall 312 withopposite sides wall 112, upon being wrapped about the elongate members or wires. An outerreflective layer 314 is provided having substantially the same width as thewall 312, however unlike thesleeve 110 inFIG. 3 , the width of thereflective layer 314 is attached misaligned (staggered) relative to the width of thewall 312. As such, oneside 330 of thereflective layer 314 is misaligned (staggered) with theside 320 of the wall, such that theside 330 of the reflective layer is adhered circumferentially inwardly of theside 320 of thewall 312, thereby leaving an exposed outer surface of thewall 312. Meanwhile, anotherside 332 of thereflective layer 314 extends circumferentially beyond theother side 322 of thewall 312 in staggered relation thereto. Accordingly, the portion of thereflective layer 314 extending beyond theside 322 can be adhered to the exposed outer surface of thewall 312 during assembly such that theopposite sides reflective layer 314 are brought into abutment or substantial abutment with one another to completely or substantially cover the entire width of thewall 312. Further, upon being fully assembled, thereflective layer 314 maintains thewall 312 in its circumferentially closed configuration. It should be recognized that the width of the reflectiveouter layer 314 could be slightly greater than the width of thewall 312, if desired, thereby providing some overlap of the reflectiveouter layer 314 on itself upon assembly. - In
FIG. 6 , a sleeve constructed in accordance with another aspect of the invention is shown generally at 410, wherein the same reference numerals used above offset by a factor of 400 indicate similar features discussed above. Thesleeve 410 has awall 412 withopposite sides reflective layer 414 is provided having a width that is greater than the width extending between thesides wall 412. Oneside 430 of thereflective layer 414 is attached in alignment or substantial alignment with oneside 420 of thewall 412 such that it is flush or substantially flush therewith, while anopposite side 432 of thereflective layer 414 extends circumferentially beyond theother side 422 of thewall 412 to provide a flap portion. Accordingly, the flap portion of thereflective layer 414 extending beyond theside 422 can be attached, such as by being adhered, for example, to aouter surface 434 of thereflective layer 414 to completely cover the entire circumferential width of thewall 412 extending between thesides reflective layer 414 extending beyond theside 422, until it becomes desired to expose the adhesive surface for bonding during assembly. - It is to be understood that other embodiments of the invention which accomplish the same function are incorporated herein within the scope of any ultimately allowed patent claims.
Claims (19)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/481,670 US20090311456A1 (en) | 2008-06-12 | 2009-06-10 | Non-woven, self-wrapping thermal sleeve |
CN200980122465.1A CN102057207B (en) | 2008-06-12 | 2009-06-11 | Non-woven, self-wrapping thermal sleeve |
PCT/US2009/046984 WO2009152293A2 (en) | 2008-06-12 | 2009-06-11 | Non-woven, self-wrapping thermal sleeve |
EP09763583.3A EP2286137B1 (en) | 2008-06-12 | 2009-06-11 | Non-woven, self-wrapping thermal sleeve |
KR1020107027379A KR101805108B1 (en) | 2008-06-12 | 2009-06-11 | Non-woven, self-wrapping thermal sleeve |
JP2011513677A JP5547723B2 (en) | 2008-06-12 | 2009-06-11 | Non-woven self-winding thermal sleeve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US6089408P | 2008-06-12 | 2008-06-12 | |
US12/481,670 US20090311456A1 (en) | 2008-06-12 | 2009-06-10 | Non-woven, self-wrapping thermal sleeve |
Publications (1)
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US20090311456A1 true US20090311456A1 (en) | 2009-12-17 |
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US12/481,670 Abandoned US20090311456A1 (en) | 2008-06-12 | 2009-06-10 | Non-woven, self-wrapping thermal sleeve |
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US (1) | US20090311456A1 (en) |
EP (1) | EP2286137B1 (en) |
JP (1) | JP5547723B2 (en) |
KR (1) | KR101805108B1 (en) |
CN (1) | CN102057207B (en) |
WO (1) | WO2009152293A2 (en) |
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Also Published As
Publication number | Publication date |
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KR101805108B1 (en) | 2017-12-05 |
WO2009152293A2 (en) | 2009-12-17 |
JP2011524824A (en) | 2011-09-08 |
KR20110036880A (en) | 2011-04-12 |
EP2286137A2 (en) | 2011-02-23 |
CN102057207B (en) | 2014-12-24 |
EP2286137B1 (en) | 2014-06-18 |
JP5547723B2 (en) | 2014-07-16 |
CN102057207A (en) | 2011-05-11 |
WO2009152293A3 (en) | 2010-03-04 |
EP2286137A4 (en) | 2011-08-03 |
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